“I don’t know,” said Riley. “This whole agriculture angle doesn’t seem to fit the Bug Killer’s methodology. This could just be a grow op.”

“Actually,” said Grissom, “there are several kinds of insects that raise crops. Termites, ants, and bark beetles all cultivate fungus as a nutritional source-ants were the first animals on Earth to deliberately grow their own food.”

Nick was examining the bodies, one by one. “These guys are in pretty good shape for six weeks of captivity-no ligature marks or bruising.”

“He kept them well fed, too,” sai d Riley, peering into a large, open garbage container. “If your idea of well fed is canned chili and beef stew.”

“Of course he did,” said Grissom softly. “They weren’t prisoners, they were workers. He gave them food, shelter, and purpose, and they performed the duties he assigned them.”

“And none of them bolted?” asked Riley. “I mean, from what I understand these guys were pretty hard-core street veterans-wary about anything that might threaten their independence. Six weeks is a long time to work for a screwball for free stew and a mattress.”

Grissom shook his head. “Slave-raider ants will stage massive invasions of other nests in order to steal pupae. When the stolen young emerge from the pupal state, chemicals released by their captors imprint them as part of the new colony. They think they belong, so they do whatever work they were born to do.”

“Chemicals,” said Nick. “You think the Bug Killer kept them in line by feeding them drugs? Or by making them feel like they belonged here?”

“What’s the difference?” said Grissom. “Either way, he found a way to meet their needs.”

“Yeah,” said Riley. “Until he didn’t need them anymore.”

Grissom knew the anisomorphal was the key.

The walking stick insect u sed the chemical as a defense to ward off predators, but that didn’t make sense; the only workable defense for the Bug Killer was to not get caught.

Maybe it is a defense-a diversion to make us look one way instead of another. A type of cryptic camouflage, like the walking stick itself-appearing to be one thing while being something else.

That simply didn’t ring true. Too much time, too much sheer biological energy had been expended on this project. That wasn’t what insects did; they were models of efficiency. Whatever LW had planned, the anisomorphal was a necessary element.

Secondary influences. Everything he’s done has been in order to trigger a larger effect. Kill a quarterback to incite a riot; kill a helper to panic a queen. Threaten a lab to unnerve an opponent…

He’s like a kid playing with a magnifying glass. Seeing which way he can make the ants run, pulling the wings off flies. By turning people into insects, he turns himself into God.

“Hey, Grissom!” Brass’s voice on the walkie-talkie. “I said, one of your associates is here and asking for you. Can you hear me inside that hood, or should I get a bullhorn?”

Grissom grabbed the walkie and responded. “Sorry. Who is it?”

“Jake Soames.”

Grissom walked back outside, pulling off his hood as soon as he was outdoors. “Jake? What are you doing here?”

Jake Soames leaned against Brass’s car, a white cardboard box on the hood beside him. “Told your dispatcher I had something important to show you, convinced ’em to cough up your location. Not interrupting, am I?”

Grissom frowned. “We’re in the middle of processing a crime scene, Jake. You shouldn’t be here.”

“You haven’t seen what I’ve brought you yet. Look.” He picked up the box and held it out. The top was transparent, with a small intake vent on one side and what looked like a tiny fan to draw air into the box. Five wasps crawled around the interior.

“Braconids?” said Grissom.

“That’s right,” said Jake proudly. “They’re parasitic, lay their eggs in the living bodies of caterpillars. They use their sense of smell to find their prey. They’re sensitive to not only the chemicals emitted by the caterpillar but the volatiles released by the plant the caterpillar is feeding on. Like a rent-a-cop responding to an alarm going off, right? Attack the plant and get an armed response for your trouble.”

“These are the ones you mentioned in your research?”

“The very same. These wasps can be trained to associate particular odors with food in about an hour. The idea is to train ’em to replace bomb- or drug-sniffing dogs. Since you gave me a tin star and all, I thought I’d lend a hand in case the bad guys left you a nasty surprise.”

“These wasps can detect explosives?”

“They bloody well better, or my grant’ll disappear.” Jake grinned. “C ome on, Gil-chance to be in on the cutting edge of science, eh? Let me and my little mates have a gander at your crime scene. I promise I won’t touch anything-you can put me in one of those all-body condoms to make sure.”

Grissom thought about it. “All right,” he said at last. “But stick close.”

“Like Vegemite on bread…”

Once he was suited up, Soames followed Grissom inside. “So this is like, what? One of those warehouses they grow marijuana in? Can’t smell a damn thing inside this suit except my own sweat…”

“Be grateful,” said Grissom. “Four corpses don’t exactly produce a pleasant bouquet.”

Grissom explained to Nick and Riley what Jake was doing there.

“You really think there might be a bomb here?” asked Nick.

“I doubt it,” said Grissom. “But there’s no harm in letting him look. Just keep an eye on him while he’s doing it.”

Jake had already begun, walking slowly around the perimeter of the room and stopping to take air samples every few feet.

Grissom joined him. “Anything?”

“Not so far. It’s a big room, though-give ’em a bit.”

As he followed Jake around the room, Grissom’s thoughts returned to Athena Jordanson. She was still important. The Bug Killer had made a queen run, but that wouldn’t be enough for him. What would? Killing her? He’d made that almost impossible by his own actions-security around her would be on high alert. The hive was buzzing with fear and anger, ready to attack anything that moved. All they needed to explode into fury was-

An irritant.

Abruptly, he knew what LW wanted the anisomorphal for.

Incentive.

“Well, that was a bust,” Jake Soames said cheerfully. “Either there’s no trinitrotoluene here, or my guys are asleep at the switch and you’re all going up in smoke.”

Nick glanced over at Grissom and raised his eyebrows.

“Jake,” said Grissom, “I appreciate you sharing your expertise, but we really have to process the crime scene now.”

“No worries. Give me a call later, Gilly-we’ll have a drink.” Grissom walked Jake and his wasps to the exit.

Riley shook her head. “I can’t believe Grissom actually let that guy into our crime scene. With a box of bugs, no less.”

“Give him a break,” said Nick. “We cleared him in the Harribold case, so he’s not a suspect. He was careful not to touch anything. And even though his methodology is a little out-there, it’s no stranger than some of the things I’ve seen Grissom do. Show the guy a little respect; he’s a scientist, no different than us.”

“Is there somet hing I’m missing here? That whole exercise seemed pretty pointless-”

Nick put up a hand. “There is something you’re missing. Not your fault; you don’t know Grissom like I do. But-you know how back in high school, there was always that one geeky kid who never had any friends? Sat by himself during lunch, usually reading a book? That’s Grissom in a nutshell. Not real good at socializing, would rather read a paper on the mating habits of the dung beetle than go to a party. It makes him real good at his job, but it’s a pretty lonely place to live.”